I'd like to see a Macbook Air with an ARM processor and a touch screen,, capable of running a hybrid version of iOS and OSX. Of course, OSX apps will need to be recompiled, just like they did with the move from Motorola to Intel a few years a go.

The only thing always behind (and has been for over 15 years) is the video. The CPU and support for new ports are usually on par if not ahead. (Firewire, thunderbolt, USB, mini Display, SD, Retina high resolution display). The only thing dated is your perspective.

An ARM processor in a notebook is a step back in performance for no gain and a total waste of resources. Running demanding desktop apps on a slower CPU isn't too smart. See Windows 8 Pro tablets for an example. The move from PPC to Intel is nothing like this. OSX already ran on Intel when it was first bought from NeXT. They just kept both architectures up to date through the entire process of building OSX from the start.

You are better off hoping for a touchscreen Macbook Air which has a better chance of happening with a hell of a lot less risk for the company and better compatibility for the user.

Yeah, when I bought the iMac the video card was already out-dated, and I bought the iMac with the best video card in 2009 (ATI 4850 with 512mb which was already out in early 2008). Back then they had a lot better GPUs which were the top I suppose, but with like 2gb of video ram which is what the latest iMac has. The CPU and such were really good though for the time. I know this isn't the MBP or the MBA, but I'm just stating Macs in general.